can u enter bios ? try cleaing the cmos . and if still nothing un hook all unessery drives hdd dcroms mice printers etc. leave the keyboard in , see if it works . if it does then try hooking up the hdd check for posting , add 1 thing as u goin thru it .... also make sure u set the ide drives slave / master and on the porper order of the ribbon ( master setting belong on the end of ribbon , slave the middle connector ) try to avoid Cable select ....